US Bridges

Southern Road over I-69

Fair

Branch County, Michigan · 1.9 MI N of Indiana State · Structure no. 000000000001089

Built
1967
58 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
312 ft
4 main spans
Daily traffic
340
2007 count
Owner
State
State Highway Agency

About this bridge

Southern Road over I-69 is a steel stringer/multi-beam or girder carrying Southern Road over I-69 in Branch County, Michigan. It was built in 1967, so it is 58 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 340 vehicles a day, projected to reach 374 by 2022. The structure is 312 ft (95.1 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSouthern Road
CrossesI-69
Location1.9 MI N of Indiana State
RouteCounty Highway 0
CountyBranch County
StateMichigan
Coordinates41.78544, -84.9915
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.8 US tons
Inventory rating32.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length312 ft (95.1 m)
Longest span92 ft (28 m)
Deck width31 ft (9.5 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic340 (2007)
Projected traffic374 by 2022
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Southern Road over I-69 built?

It was built in 1967, making it 58 years old in 2025.

What condition is Southern Road over I-69 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does Southern Road over I-69 carry?

About 340 vehicles per day (2007 count).

How long is Southern Road over I-69?

The structure is 312 ft (95.1 m) long with a longest span of 92 ft (28 m) and a deck 31 ft wide.

Who owns Southern Road over I-69?

It is owned by the State Highway Agency.